CN110639690B - Beneficiation method for high-mud micro-fine particle rare earth minerals - Google Patents
Beneficiation method for high-mud micro-fine particle rare earth minerals Download PDFInfo
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 74
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 24
- 239000011707 mineral Substances 0.000 title claims abstract description 24
- 239000010419 fine particle Substances 0.000 title claims abstract description 15
- 239000012141 concentrate Substances 0.000 claims abstract description 97
- 238000005188 flotation Methods 0.000 claims abstract description 82
- 238000000926 separation method Methods 0.000 claims abstract description 25
- 230000005484 gravity Effects 0.000 claims abstract description 21
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- 230000002000 scavenging effect Effects 0.000 claims abstract description 6
- 239000004088 foaming agent Substances 0.000 claims description 13
- 235000019353 potassium silicate Nutrition 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- ABBQHOQBGMUPJH-UHFFFAOYSA-M Sodium salicylate Chemical compound [Na+].OC1=CC=CC=C1C([O-])=O ABBQHOQBGMUPJH-UHFFFAOYSA-M 0.000 claims description 7
- 229960004025 sodium salicylate Drugs 0.000 claims description 7
- VDEUYMSGMPQMIK-UHFFFAOYSA-N benzhydroxamic acid Chemical compound ONC(=O)C1=CC=CC=C1 VDEUYMSGMPQMIK-UHFFFAOYSA-N 0.000 claims description 6
- BURBNIPKSRJAIQ-UHFFFAOYSA-N 2-azaniumyl-3-[3-(trifluoromethyl)phenyl]propanoate Chemical compound OC(=O)C(N)CC1=CC=CC(C(F)(F)F)=C1 BURBNIPKSRJAIQ-UHFFFAOYSA-N 0.000 claims description 4
- 229940063284 ammonium salicylate Drugs 0.000 claims description 4
- 239000004604 Blowing Agent Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical group CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims 2
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims 2
- 229940116411 terpineol Drugs 0.000 claims 2
- 238000011084 recovery Methods 0.000 abstract description 19
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 3
- 239000010665 pine oil Substances 0.000 description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- -1 bastnaesite Chemical compound 0.000 description 2
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008396 flotation agent Substances 0.000 description 2
- 229910052590 monazite Inorganic materials 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910052612 amphibole Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052626 biotite Inorganic materials 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 150000002923 oximes Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- UXBZSSBXGPYSIL-UHFFFAOYSA-N phosphoric acid;yttrium(3+) Chemical compound [Y+3].OP(O)(O)=O UXBZSSBXGPYSIL-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 229910000164 yttrium(III) phosphate Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a beneficiation method of high-mud micro-fine particle rare earth minerals. The beneficiation method comprises the following steps: performing magnetic separation after reselection to obtain magnetic concentrate and magnetic tailings; grading the magnetic concentrate; performing spiral chute reselection and table reselection on the A size fraction to obtain table rare earth concentrate and table tailings; -A size fraction size mixing, primary flotation roughing, primary flotation scavenging and primary blank concentration are carried out to obtain flotation rough concentrate flotation; and reselecting the flotation rough concentrate to obtain centrifugally reselected rare earth concentrate and centrifugally reselected rare earth middling, and combining the table rare earth concentrate and the centrifugally reselected rare earth concentrate into total rare earth concentrate. The beneficiation method has the advantages of strong processing capacity per unit area, high separation efficiency and floor area saving; by adopting the method combining flotation and gravity separation, the flotation reagent has the advantages of low consumption, low cost, high beneficiation-enrichment ratio and high rare earth recovery rate.
Description
Technical Field
The invention relates to the technical field of ore dressing, in particular to an ore dressing method for high-mud micro-fine particle rare earth minerals.
Technical Field
Rare earth elements are known as "industrial vitamins", are widely applied to the fields of petroleum, chemical industry, metallurgy, permanent magnet materials and the like, and are strategic resources for developing economy and military affairs. China is a major country of rare earth resources, wherein Sichuan is the second major province of rare earth resources in China, light rare earth is mainly used and mainly distributed in crown county and German city in Liangshan, and main rare earth minerals comprise bastnaesite, monazite, limonite and the like. The rare earth deposit surface green ore is usually seriously weathered, the contents of primary slime and micro-fine particle rare earth minerals are high, the characteristics of complexity and difficulty in separation exist, and the rare earth deposit surface green ore can be lost into tailings when the rare earth deposit surface green ore is not recovered in time.
Many domestic institutions, enterprises and scholars have deep knowledge on rare earth beneficiation technologies, technical research and development are carried out on the improvement of the rare earth recovery rate, and the current production means include single gravity separation, gravity separation-dry magnetic separation, flotation-high gradient magnetic separation, strong magnetic separation-flotation, strong magnetic separation-gravity separation-flotation and the like, but research on rare earth minerals with various properties and development of related technologies are still required to be continuously increased, particularly recovery of micro-fine rare earth minerals. At present, the recovery of the flotation agent mainly focuses on the research and development of the flotation agent, and the problem of high production cost still exists, so that the recovery is difficult to realize in production.
Li Fangji (flotation research of fine-grained rare earth minerals, journal of Shanghai second university of industry, 2000(2), 1-7) reports a flotation process based on a desliming device and a new medicament, and rare earth concentrate with 65-70% of REO and 85-90% of recovery rate can be obtained under the conditions of pH 8.0-8.5, concentration of 28-30%, temperature of 36-40 ℃, rotation speed of 1440 rpm and 3.11-9.52% of REO. The method has the defects of single method, high heating energy consumption and high requirement on the grade of selection.
Therefore, the development of the beneficiation method aiming at the high-mud micro-fine particle rare earth minerals with lower cost, higher sorting efficiency and higher recovery rate has important research significance and application value.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of high cost, low sorting efficiency and low recovery rate of a beneficiation method for high-mud micro-fine particle rare earth minerals in the prior art, and provides the beneficiation method for the high-mud micro-fine particle rare earth minerals. The beneficiation method has the advantages of strong processing capacity per unit area, high separation efficiency and floor area saving; by adopting the method combining flotation and gravity separation, the flotation reagent has the advantages of low consumption, low cost, high beneficiation-enrichment ratio and high rare earth recovery rate. .
In order to realize the purpose of the invention, the invention adopts the following scheme:
a beneficiation method for high-mud micro-fine particle rare earth minerals comprises the following steps:
s1: reselecting the high-mud micro-fine particle rare earth minerals to obtain centrifugal rough concentrate and centrifugal tailings;
s2: magnetically separating and centrifuging the rough concentrate to obtain magnetically separated concentrate and magnetically separated tailings; grading the magnetic concentrate into + A and-A fractions; wherein A is 0.04-0.05 mm;
s3: performing spiral chute reselection on the A size fraction to obtain spiral chute rough concentrate and spiral chute tailings; performing table concentrator gravity separation on the rough concentrate of the spiral chute to obtain table concentrator rare earth concentrate and table concentrator tailings;
s4: the grade A is subjected to size mixing until the concentration of the ore pulp is 20-33%, water glass, a collecting agent and a foaming agent are added, and primary flotation roughing is carried out to obtain flotation roughing concentrates and flotation roughing tailings; the adding amount of the water glass is 400-1000 g/t; the adding amount of the collecting agent is 200-2000 g/t; the addition amount of the foaming agent is 10-150 g/t;
s5: adding a collecting agent and a foaming agent into the flotation roughing tailings to perform primary flotation scavenging to obtain scavenged concentrate and scavenged tailings, and returning the scavenged concentrate to the primary flotation roughing operation to form closed cycle; the adding amount of the collecting agent is 500-1000 g/t; the addition amount of the foaming agent is 10-40 g/t;
s6: performing primary blank concentration on the flotation roughing concentrates to obtain flotation roughing concentrates and flotation tailings, and returning the flotation tailings to primary flotation roughing operation to form closed cycle;
s7: and reselecting the flotation rough concentrate to obtain centrifugally reselected rare earth concentrate and centrifugally reselected rare earth middling, and combining the table rare earth concentrate and the centrifugally reselected rare earth concentrate into total rare earth concentrate.
The invention firstly utilizes gravity separation and pre-tailing discarding to ensure the recovery of fine-grained rare earth minerals, achieves the desliming effect while discarding gangue minerals and reduces the interference on flotation; then a spiral chute is adopted for roughing, so that the occupied area is saved; in addition, the combination of gravity separation and magnetic separation is more suitable for the separation of low-grade ores, and the adaptability is strong.
The beneficiation method has the advantages of strong processing capacity per unit area, high separation efficiency and floor area saving; by adopting the method combining flotation and gravity separation, the flotation reagent has the advantages of low consumption, low cost, high beneficiation-enrichment ratio and high rare earth recovery rate.
It will be appreciated that each additive is used in the beneficiation of ores in quantities per ton (t) of ore.
Preferably, the gravity is performed using a centrifugal concentrator in S1.
Preferably, A in S2 is 0.045 mm.
Preferably, the field intensity of the background magnetic field for magnetic separation in S2 is 0.9-1.3T.
More preferably, the magnetic separation in S2 has a background magnetic field strength of 1.2T.
Collectors and frothers conventional in the art may be used in the present invention.
Preferably, the modulus of the water glass in S4 is 2.2-2.8.
Preferably, the amount of the water glass added in S4 is 800 g/t.
Preferably, the collector in S4 is one or more of sodium salicylate hydroxamate, ammonium salicylate hydroxamate, or benzohydroxamic acid.
Preferably, the addition amount of the collector in S4 is 500 g/t.
Preferably, the foaming agent in S4 is pine oil.
Preferably, the blowing agent is added in an amount of 50 g/t.
Preferably, the collector in S5 is one or more of sodium salicylate hydroxamate, ammonium salicylate hydroxamate, or benzohydroxamic acid.
Preferably, the addition amount of the collector in S5 is 500 g/t.
Preferably, the foaming agent in S5 is pine oil.
Preferably, the blowing agent in S5 is added in an amount of 10 g/t.
Preferably, the pulp concentration of the flotation roughed concentrate in S6 is 5-20%.
Preferably, the gravity is performed using a centrifugal concentrator in S7.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method has the advantages that the tail is discarded in advance by gravity separation, the recovery of fine-grained rare earth minerals is guaranteed, the desliming effect is achieved while gangue minerals are discarded, and the interference on flotation is reduced;
(2) the spiral chute is adopted for roughing, so that the occupied area is saved;
(3) the combination of gravity separation and magnetic separation is more suitable for the separation of low-grade ores, and the adaptability is strong.
The flotation reagent has the advantages of low consumption, low cost, high rare earth recovery rate, low cost, high separation efficiency and high recovery rate.
Detailed Description
The invention is further illustrated by the following examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention. Experimental procedures without specific conditions noted in the examples below, generally according to conditions conventional in the art or as suggested by the manufacturer; the raw materials, reagents and the like used are, unless otherwise specified, those commercially available from the conventional markets and the like. Any insubstantial changes and substitutions made by those skilled in the art based on the present invention are intended to be covered by the claims.
Example 1
The embodiment provides a beneficiation method of high-mud micro-fine particle rare earth minerals, which comprises the following specific processes.
The rare earth ore is selected from some rare earth ores, the main minerals of which comprise bastnaesite, limonite, bastnaesite, monazite, xenotime, feldspar, dolomite, quartz, amphibole, stevensite, biotite, kaolin, neon, chlorite, hematite, limonite and the like, and the REO grade is 1.45%. Carrying out gravity separation and tailing discarding on the ore by a centrifugal separator to obtain centrifugal rough concentrate and centrifugal tailings; under the condition that the field intensity of a background magnetic field is 0.9T, magnetically separating and centrifuging the rough concentrate to obtain magnetically separated concentrate and magnetically separated tailings; grading the magnetic concentrate into two size fractions of +0.045mm and-0.045 mm; carrying out spiral chute reselection on the size fraction of +0.045mm to obtain spiral chute rough concentrate and spiral chute tailings; performing table concentrator gravity separation on the rough concentrate of the spiral chute to obtain table concentrator rare earth concentrate and table concentrator tailings; 0.045mm size fraction size mixing is carried out until the concentration of the ore pulp is 20%, according to the ore feeding of each ton, 400 g of water glass with the modulus of 2.2 is added for size mixing, 2000g of sodium salicyloxy oxime ate and 150g of pine oil in sequence, and primary flotation roughing is carried out to obtain flotation roughing concentrate and flotation roughing tailings; the concentration of the flotation roughing tailing pulp is 18%, 1000g of sodium salicylate oximate and 10g of pine oil are added for primary flotation scavenging to obtain scavenged concentrate and scavenged tailing, and the scavenged concentrate returns to the primary flotation roughing operation to form closed cycle; the concentration of the flotation roughing concentrate ore pulp is 5 percent, primary blank concentration is carried out to obtain flotation roughing concentrate and flotation tailings, and the flotation tailings return to primary flotation roughing operation to form closed cycle; and (3) reselecting the flotation rough concentrate by using a centrifugal concentrator to obtain centrifugal reselected rare earth concentrate and centrifugal reselected rare earth middling, combining the table rare earth concentrate and the centrifugal reselected rare earth concentrate into total rare earth concentrate, wherein the REO grade is 52.15%, and the recovery rate is 75.24%.
Example 2
The embodiment provides a beneficiation method of high-mud micro-fine particle rare earth minerals, which comprises the following specific processes.
The material was selected as in example 1, with an REO grade of 1.02%. Carrying out gravity separation and tailing discarding on the ore by a centrifugal separator to obtain centrifugal rough concentrate and centrifugal tailings; under the condition that the field intensity of a background magnetic field is 1.3T, magnetically separating and centrifuging the rough concentrate to obtain magnetically separated concentrate and magnetically separated tailings; grading the magnetic concentrate into two size fractions of +0.045mm and-0.045 mm; carrying out spiral chute reselection on the size fraction of +0.045mm to obtain spiral chute rough concentrate and spiral chute tailings; performing table concentrator gravity separation on the rough concentrate of the spiral chute to obtain table concentrator rare earth concentrate and table concentrator tailings; 0.045mm size fraction size mixing is carried out until the concentration of the ore pulp is 30%, 1000g of water glass with the modulus of 2.5, 1000g of benzohydroxamic acid and 10g of pine oil are added in turn according to each ton of fed ore to carry out primary flotation roughing, and flotation roughing concentrate and flotation roughing tailings are obtained; the concentration of the flotation roughing tailing pulp is 28%, 1000g of benzohydroxamic acid and 30 g of pine oil are added for primary flotation scavenging to obtain scavenged concentrate and scavenged tailing, and the scavenged concentrate returns to the primary flotation roughing operation to form closed cycle; the concentration of the flotation roughing concentrate ore pulp is 10 percent, primary blank concentration is carried out to obtain flotation roughing concentrate and flotation tailings, and the flotation tailings return to primary flotation roughing operation to form closed cycle; and (3) reselecting the flotation rough concentrate by using a centrifugal concentrator to obtain centrifugal reselected rare earth concentrate and centrifugal reselected rare earth middling, combining the table rare earth concentrate and the centrifugal reselected rare earth concentrate into total rare earth concentrate, wherein the REO grade is 54.24%, and the recovery rate is 70.28%.
Example 3
The embodiment provides a beneficiation method of high-mud micro-fine particle rare earth minerals, which comprises the following specific processes.
The material was selected as in example 1, with an REO grade of 1.88%. Carrying out gravity separation and tailing discarding on the ore by a centrifugal separator to obtain centrifugal rough concentrate and centrifugal tailings; under the condition that the field intensity of a background magnetic field is 1.2T, magnetically separating and centrifuging the rough concentrate to obtain magnetically separated concentrate and magnetically separated tailings; grading the magnetic concentrate into two size fractions of +0.045mm and-0.045 mm; carrying out spiral chute reselection on the size fraction of +0.045mm to obtain spiral chute rough concentrate and spiral chute tailings; performing table concentrator gravity separation on the rough concentrate of the spiral chute to obtain table concentrator rare earth concentrate and table concentrator tailings; 0.045mm size fraction size mixing is carried out until the concentration of the ore pulp is 23%, according to the ore feeding of each ton, 800g of water glass with the modulus of 2.8 is added for size mixing, 500g of sodium salicylate oximate and 40g of pine oil are added in sequence, and primary flotation roughing is carried out to obtain flotation roughing concentrate and flotation roughing tailings; the concentration of the ore pulp of the flotation roughing tailings is 20%, 500g of sodium salicylate oximate and 10g of pine oil are added for primary flotation scavenging to obtain scavenged concentrate and scavenged tailings, and the scavenged concentrate is returned to the primary flotation roughing operation to form closed cycle; the concentration of the flotation roughing concentrate ore pulp is 15%, primary blank concentration is carried out to obtain flotation roughing concentrate and flotation tailings, and the flotation tailings return to primary flotation roughing operation to form closed cycle; and (3) reselecting the flotation rough concentrate by using a centrifugal concentrator to obtain centrifugal reselected rare earth concentrate and centrifugal reselected rare earth middling, combining the table rare earth concentrate and the centrifugal reselected rare earth concentrate into total rare earth concentrate, wherein the REO grade is 56.74%, and the recovery rate is 77.11%.
Therefore, the flotation reagent has the advantages of low consumption, low cost, high rare earth recovery rate, low cost, high sorting efficiency and high recovery rate.
While the foregoing is directed to particular example embodiments of the present invention, numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present invention. Rather, the scope of the invention is defined by the appended claims and equivalents thereof.
Claims (11)
1. The beneficiation method of the high-mud micro-fine particle rare earth minerals is characterized by comprising the following steps of:
s1: reselecting the high-mud micro-fine particle rare earth minerals to obtain centrifugal rough concentrate and centrifugal tailings;
s2: magnetically separating and centrifuging the rough concentrate to obtain magnetically separated concentrate and magnetically separated tailings; grading the magnetic concentrate into + A and-A fractions; wherein A is 0.04-0.05 mm;
s3: performing spiral chute reselection on the A size fraction to obtain spiral chute rough concentrate and spiral chute tailings; performing table concentrator gravity separation on the rough concentrate of the spiral chute to obtain table concentrator rare earth concentrate and table concentrator tailings;
s4: the grade A is subjected to size mixing until the concentration of the ore pulp is 20-33%, water glass, a collecting agent and a foaming agent are added, and primary flotation roughing is carried out to obtain flotation roughing concentrates and flotation roughing tailings; the adding amount of the water glass is 400-1000 g/t; the adding amount of the collecting agent is 200-2000 g/t; the addition amount of the foaming agent is 10-150 g/t;
s5: adding a collecting agent and a foaming agent into the flotation roughing tailings to perform primary flotation scavenging to obtain scavenged concentrate and scavenged tailings, and returning the scavenged concentrate to the primary flotation roughing operation to form closed cycle; the adding amount of the collecting agent is 500-1000 g/t; the addition amount of the foaming agent is 10-40 g/t;
s6: performing primary blank concentration on the flotation roughing concentrates to obtain flotation roughing concentrates and flotation tailings, and returning the flotation tailings to primary flotation roughing operation to form closed cycle;
s7: reselecting the flotation rough concentrate to obtain centrifugally reselected rare earth concentrate and centrifugally reselected rare earth middling, and combining table rare earth concentrate and centrifugally reselected rare earth concentrate into total rare earth concentrate;
wherein the dosage of each additive in the ore dressing is calculated by each ton (t) of ore.
2. A beneficiation process according to claim 1, wherein the gravity separation is performed using a centrifugal concentrator in S1.
3. The beneficiation method according to claim 1, wherein the field strength of the background magnetic field for magnetic separation in S2 is 0.9-1.3T.
4. The beneficiation method according to claim 1, wherein a in S2 is 0.045 mm.
5. The beneficiation method according to claim 1, wherein the modulus of the water glass in S4 is 2.2 to 2.8; the collecting agent is one or more of sodium salicylate hydroxamate, ammonium salicylate hydroxamate or benzohydroxamic acid; the foaming agent is terpineol oil.
6. The beneficiation method according to claim 1, wherein the amount of the water glass added in S4 is 800 g/t; the adding amount of the collecting agent is 500 g/t; the addition of the blowing agent was 50 g/t.
7. The beneficiation method according to claim 1, wherein the collector in S5 is one or more of sodium salicylate hydroxamate, ammonium salicylate hydroxamate or benzohydroxamic acid; the foaming agent is terpineol oil.
8. A beneficiation method according to claim 1, wherein the pulp concentration of the flotation rougher tailings in S5 is 15-30%.
9. The beneficiation method according to claim 1, wherein the addition amount of the collector in the S5 is 500 g/t; the addition amount of the foaming agent is 10 g/t.
10. The beneficiation method according to claim 1, wherein the pulp concentration of the flotation rougher concentrate in S6 is 5-20%.
11. A beneficiation process according to claim 1, wherein the gravity separation is performed using a centrifugal concentrator in S7.
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| CN111346742A (en) * | 2020-03-16 | 2020-06-30 | 江西理工大学 | Mineral separation method applying superconducting magnetic separation to rare earth ore |
| CN113333151B (en) * | 2021-06-02 | 2022-09-02 | 矿冶科技集团有限公司 | Beneficiation method for gold ore |
| CN113333181B (en) * | 2021-06-18 | 2022-10-11 | 核工业北京化工冶金研究院 | Flotation method for severely weathered rare earth ore |
| CN113731627B (en) * | 2021-09-06 | 2023-06-09 | 核工业北京化工冶金研究院 | Pre-tailing-throwing mixed flotation method for rare earth multi-metal ore |
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| CN102489386B (en) * | 2011-12-13 | 2013-06-19 | 广州有色金属研究院 | Method for separating fine cassiterite |
| CN103301949B (en) * | 2013-05-17 | 2014-08-13 | 中国地质科学院矿产综合利用研究所 | Foaming agent for rare earth ore dressing and normal-temperature ore dressing process of low-grade refractory rare earth ore |
| CN103962232B (en) * | 2014-05-08 | 2016-06-08 | 广东省工业技术研究院(广州有色金属研究院) | A kind of beneficiation method of Rare Earth Mine |
| CN104984821B (en) * | 2015-07-15 | 2017-03-01 | 昆明理工大学 | A kind of beneficiation method separating weakly magnetic mineral and Muscovitum |
| CN106583023A (en) * | 2016-11-23 | 2017-04-26 | 昆明理工大学 | Beneficiation method for microgranular cassiterite |
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| CN109013048A (en) * | 2018-09-25 | 2018-12-18 | 李梅 | A kind of raising zircon concentrate grade obtains the beneficiation method of rareearth enriching material simultaneously |
| CN109759222B (en) * | 2019-01-21 | 2021-02-05 | 内蒙古科技大学 | Method for improving grade of bayan obo ore fluorite concentrate and rare earth concentrate through high-gradient superconducting magnetic separation |
| CN109806966B (en) * | 2019-02-21 | 2021-11-16 | 中国地质科学院矿产综合利用研究所 | Beneficiation method for comprehensively recovering strontium minerals from rare earth tailings |
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